95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
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* Copyright (c) 2019 Leandro A. F. Pereira
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* Copyright (c) 2020 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <soc/efuse_reg.h>
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#include <soc/reset_reasons.h>
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#include "esp_system.h"
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#include "rtc.h"
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#include <zephyr/drivers/hwinfo.h>
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#include <string.h>
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ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
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{
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#if !defined(CONFIG_SOC_SERIES_ESP32) && !defined(CONFIG_SOC_SERIES_ESP32_NET)
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uint32_t rdata1 = sys_read32(EFUSE_RD_MAC_SPI_SYS_0_REG);
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uint32_t rdata2 = sys_read32(EFUSE_RD_MAC_SPI_SYS_1_REG);
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#else
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uint32_t rdata1 = sys_read32(EFUSE_BLK0_RDATA1_REG);
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uint32_t rdata2 = sys_read32(EFUSE_BLK0_RDATA2_REG);
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#endif
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uint8_t id[6];
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/* The first word provides the lower 32 bits of the MAC
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* address; the low 16 bits of the second word provide the
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* upper 16 bytes of the MAC address. The upper 16 bits are
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* (apparently) a checksum, and reserved. See ESP32 Technical
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* Reference Manual V4.1 section 20.5.
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*/
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id[0] = (uint8_t)(rdata2 >> 8);
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id[1] = (uint8_t)(rdata2 >> 0);
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id[2] = (uint8_t)(rdata1 >> 24);
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id[3] = (uint8_t)(rdata1 >> 16);
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id[4] = (uint8_t)(rdata1 >> 8);
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id[5] = (uint8_t)(rdata1 >> 0);
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if (length > sizeof(id)) {
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length = sizeof(id);
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}
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memcpy(buffer, id, length);
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return length;
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}
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int z_impl_hwinfo_get_supported_reset_cause(uint32_t *supported)
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{
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*supported = (RESET_POR
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| RESET_PIN
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| RESET_SOFTWARE
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| RESET_WATCHDOG
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| RESET_LOW_POWER_WAKE
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| RESET_CPU_LOCKUP
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| RESET_BROWNOUT);
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return 0;
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}
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int z_impl_hwinfo_get_reset_cause(uint32_t *cause)
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{
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uint32_t reason = esp_reset_reason();
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switch (reason) {
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case ESP_RST_POWERON:
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*cause = RESET_POR;
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break;
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case ESP_RST_EXT:
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*cause = RESET_PIN;
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break;
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case ESP_RST_SW:
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*cause = RESET_SOFTWARE;
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break;
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case ESP_RST_INT_WDT:
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case ESP_RST_TASK_WDT:
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case ESP_RST_WDT:
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*cause = RESET_WATCHDOG;
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break;
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case ESP_RST_DEEPSLEEP:
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*cause = RESET_LOW_POWER_WAKE;
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break;
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case ESP_RST_PANIC:
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*cause = RESET_CPU_LOCKUP;
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case ESP_RST_BROWNOUT:
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*cause = RESET_BROWNOUT;
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break;
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default:
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*cause = 0;
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break;
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}
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return 0;
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}
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